Ensure perfect text size for clarity and engagement in every email you send.
Campaign Cleaner automatically detects and adjusts font sizes across your email to ensure every line of text is readable on desktop and mobile - without triggering spam filters or accessibility issues.
Quick Overview of Features
Font size is one of the most frequently overlooked elements of email design. It affects whether subscribers can read your content without straining, whether your email passes accessibility checks, and whether spam filters flag your message for hiding text. Getting font size right is not just about aesthetics - it directly impacts deliverability and engagement.
The challenge is that font sizes set during template design don't always translate correctly across email clients and devices. iOS Mail auto-scales small text. Outlook ignores certain font declarations. Mobile screens require larger text than desktop. A font size that looks perfect in your email builder may be too small for half your audience when the campaign actually lands.
The industry standard for email body text is 14 to 16 pixels. At 14px, text is readable on desktop but can be small on mobile screens. At 16px, body text is comfortable for both desktop and mobile reading without zooming. Text below 14px is generally considered inaccessible and should be avoided in any content the subscriber is meant to read. The only exception is fine print and legal disclaimers, which conventionally appear at 10 to 12px.
Email main headings perform best at 22 to 28 pixels. This range is large enough to establish visual hierarchy without overwhelming the layout on small screens. Subheadings typically sit between 18 and 22 pixels. CTA buttons should use text of at least 16 pixels - button labels smaller than that are difficult to tap accurately on touchscreens and reduce click-through rates on mobile.
Mobile accounts for more than half of email opens. On a standard smartphone, text needs to be larger than on desktop to achieve the same perceived size. iOS Mail has a built-in minimum font size of 13px and will auto-scale anything smaller - which can break your layout if columns and containers are not designed with this in mind. Setting your base body font to 16px prevents auto-scaling entirely on iOS devices.
Spam filters look for hidden text - a technique historically used by spammers to stuff keywords into emails that humans couldn't see. The most common method was making text the same color as the background, but using extremely small font sizes achieves the same result. SpamAssassin and similar filters flag very small text, especially when it's numerous and placed near images. Campaign Cleaner detects these patterns and brings all font sizes within a readable, filter-safe range before you send.
Are You Ready To Experience The Difference?
Become a part of the Campaign Cleaner community today, and join countless satisfied customers who have witnessed significant improvements in their email deliverability and campaign success. Don't let HTML issues hold you back; let Campaign Cleaner optimize your campaigns and boost your inbox rates.
